B has two isotopes 10B (19%) and 11B( 81%) . What is the atomic mass of B .
The mass to charge ratio (m//e) for a cation is 1.5xx10^(-8) kg//C. What is the mass of this cation?
A metal M forms the sulphate M_2(SO_4)_3. A0.596 gram sample of the sulphate reacts with excess BaCI_2 to given 1.220g BaSO_4 . What is the atomic mass of M? (Atomic mass : S=32, Ba=137.3 )
The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photomission of electrons occurs. What is the stopping potential.
1g mixture of equal number of mole of Li_2 Co_3 and other metal carbonate (M_2 CO_3) required 21.6 mL of 0.5 NHCI for complete neutralisation reaction. What is the approximate atomic mass of the other metal ?
The number density of free electrons in a metal piece is a very large of the order of 10^(+29) m^-3 . Why is there no current in the metal piece in the absence of electric field across it ?
